Open5GS AMF gmm-handler.c denial of service
Published May 2, 2026
5.3
MEDIUMCVSS 4.0
EPSS 0.53%
Description
A vulnerability has been found in Open5GS up to 2.7.6. Affected is an unknown function of the file src/amf/gmm-handler.c of the component AMF. The manipulation of the argument reg_type leads to denial of service. The attack is possible to be carried out remotely. Upgrading to version 2.7.7 is able to address this issue. The identifier of the patch is ebc66942b6f8f1fab2d640e71cf4e9f1a423b426. It is advisable to upgrade the affected component.
Affected products
-
- Version 2.7.0StatusaffectedConstraints-
- Version 2.7.1StatusaffectedConstraints-
- Version 2.7.2StatusaffectedConstraints-
- Version 2.7.3StatusaffectedConstraints-
- Version 2.7.4StatusaffectedConstraints-
- Version 2.7.5StatusaffectedConstraints-
- Version 2.7.6StatusaffectedConstraints-
- Version 2.7.7StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
1 other source (NVD) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C
AV:N/AC:L/Au:S/C:N/I:N/A:P/E:ND/RL:OF/RC:C
1 other source (NVD) ▾
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 4, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.53% (0.00533) | 43.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.40% (0.00398) | 31.37th | v5 (v2026.06.15) |
| May 2, 2026 | 0.06% (0.00057) | 17.75th | v4 (v2025.03.14) |
References (7)
- https://github.com/open5gs/open5gs/ product
- https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426 patch
- https://github.com/open5gs/open5gs/issues/4321 issue-tracking
- https://github.com/open5gs/open5gs/releases/tag/v2.7.7 patch
- https://vuldb.com/submit/805675 third-party-advisory
- https://vuldb.com/vuln/360558 vdb-entrytechnical-description
- https://vuldb.com/vuln/360558/cti signaturepermissions-required
| Link | Providers | Tags |
|---|---|---|
| https://github.com/open5gs/open5gs/ | product | |
| https://github.com/open5gs/open5gs/commit/ebc66942b6f8f1fab2d640e71cf4e9f1a423b426 | patch | |
| https://github.com/open5gs/open5gs/issues/4321 | issue-tracking | |
| https://github.com/open5gs/open5gs/releases/tag/v2.7.7 | patch | |
| https://vuldb.com/submit/805675 | third-party-advisory | |
| https://vuldb.com/vuln/360558 | vdb-entrytechnical-description | |
| https://vuldb.com/vuln/360558/cti | signaturepermissions-required |
Change history (0)
No recorded changes yet.